1. Almécija, S., Smaers, J. B., & Jungers, W. L. (2015). The evolution of human and ape hand proportions. Nature Communications, 6, 7717.
2. Benton, M. J., Donoghue, P. C. J., & Asher, R. J. (2009). Calibrating and constraining molecular clocks. In S. B. Hedges & S. Kumar (Eds.), The timetree of life (pp. 35–86). New York: Oxford University Press.
3. Birkhead, T. (2000). Promiscuity: An evolutionary history of sperm competition. Cambridge: Harvard University Press.
4. Boesch, C. (2002). Cooperative hunting roles among Tai chimpanzees. Human Nature, 13(1), 27–46.
5. Boesch, C., & Boesch, H. (1990). Tool use and tool making in wild chimpanzees. Folia Primatologica, 54(1–2), 86–99.